Lightfastness is one of the most important quality indicators of art materials, showing how well a pigment withstands the effects of light over time. When an artwork is exposed to daylight or strong artificial light, some colors may fade or shift over the years. This makes lightfastness especially important for works intended for display, sale, or long-term preservation. The marking on a paint tube, pencil, or marker is not just a technical detail, but information about how permanent your work will truly be.
